The 2023 Australian motorcycle Grand Prix (officially known as the MotoGP Guru by Gryfyn Australian Motorcycle Grand Prix) was the sixteenth round of the 2023 Grand Prix motorcycle racing season. It was held at the Phillip Island Grand Prix Circuit in Phillip Island on 21–22 October 2023.

Due to inclement weather forecast on 22 October, the schedule for the MotoGP sprint and main race was swapped, with the main race being held on 21 October, while the sprint was scheduled to be held on 22 October. For the first time since the 2015 Dutch TT, the MotoGP race was held on Saturday. Both the Moto2 and Moto3 were held on 22 October, with both classes having a warm up session introduced. All races on 22 October also started an hour earlier than planned to avoid the inclement weather.

Coming into the weekend, Francesco Bagnaia leads the Riders' Championship by 18 points from Jorge Martín, with Marco Bezzecchi third, a further 45 points behind. Ducati, having secured the 5th title at the Indonesian Grand Prix, leads the Constructors' Championship over KTM by 244 points and Aprilia by a further 17 points.

Free Practice sessions on Friday and Saturday do not determine riders to qualify for Q2.

The top ten riders (written in bold) qualified for Q2.

The top fourteen riders (written in bold) qualified for Q2.

The top fourteen riders (written in bold) qualified for Q2.

Due to inclement weather, the MotoGP Sprint was cancelled. It was initially scheduled to be held after the Moto2 race.